These assets are provided as part of GameDev.tv's Complete Unity Developer 2D course and a part of the Super Platformer Assets created by Foxfin and available on the Unity Asset store - https://assetstore.unity.com/packages/2d/environments/super-platformer-assets-42013.

You are permitted to use these with a personal license which means you can use them for your student project and for learning but you CANNOT use them in a published game. To use these assets in a published game you will need to purchase the asset pack from the asset store - https://assetstore.unity.com/packages/2d/environments/super-platformer-assets-42013